C clamp



w. F. GREATHEAD Er A.

,cz-CLAMP Filed. Aug. 25, 1923 patented- Nov. 3, 1925.

.WILLIAM r. @rammentare-.mwen hammamet QLWELANQWQIHO, Assseuens, lin:mancr.-iumamenaassaetaiaunvrs, QLQNETHALE ToUwtLmMf-E. stammen,

y .Annone-:HALF To, JAMES. C..,I eARMo, ,Borla-QF: curateur; lomo.

Y c, ,t1-LAMP.

-appneaaan fue@ August 25, 19a-3; :serial No. 953,495; "I

To al whom. z'mag/ concemv': y v

'.Be 1t known jthat we, VVILLiAM" F. vGrRnAT- Iman and-MIHION QJ. TAML-YN, citizens of the United States, f. and residents, .respectir-'elwy ,ofClevelanch yin the county of lGuyahoga-and State of Ohio, and Cleveland, in the county of'lC'uyahoga and State ofOhio, have Ainvented a'certain new and useful` In provement .in 'C Clamps, of Vwhich zthe fol lcwingis a full,fclear,y and exact description. cThe. present invention relates to a clamp of thevari'ety .which in trade. is known as a.

C-clamp, the purpose and .use of which are perfectly well known.

Reference should V`be. had` to the accom 1panying drawings forming a Vpart of 'this specification,V inwhich lis a side elevation; Fig. 2 is a side elevation of one part of the .body ofthe clamp; Fig. 3.is an elevation of. a complementary portion of theV body of'the clamp; Fig. Lis a section upon the line 4 4 of Fig. l; Fig. 5 is a section on the line 5 5 of Fig. 2; Fig. 6 is a section on the line 6-6 of Fig. 3; and Fig. 7 is an end elevation of Fig. l.

Referring to the drawing, the body of the clamp is generally represented at l, and is made up in its preferable form of two sheet metal stampings which are represented at 2 in Fig. 2, and 3 in Fig. 3.

The part 2 as before stated, is preferably formed vas a stamping of sheet metal having a general C shape, in one of which there is a depression or groove represented at 4, and

' when this part is formed, there are two parallel flanges which are indicated at 5 and' 6.

The part 3 which is shown in Figs. 3 and G is also profe-1 ably formed as a stamping of sheet metal, and it is provided with a groove on one side thereof, as indicated at 7 with sh rt extending flanges such as indicated at 8 and 9. This forms a rigid selfsustaining body.

In making up the body portion of the C clamp the part 3 is inserted within the part 2 in such fashion that the groove 7 is occupied by the extension caused by the forming of the groove 4 in the part 2. The manner of their assembly is shown in Fiom 4, and when the parts are assembled as described, the edges of the flanges 5 and 6 are bent over and around the edges of the anges 8 and 9, thus Iforming the parts 2 and 3iIit0 an integralbody. The A,formingzof 'the bodyy with ythedepressiousor grooves as before. sta-ted', and `the folding Iover `of the edgesM of thei yflanges 5 a-ndGprQduCe a frigid body which is entirely, capable of sustaining-the strains to which it 1s subjected in its-use.'`

' .One `end-of the member?J yis formed -witlra squared end as' indicated at 1F,-an dvv better shown in Figa?, and this.. squared endis adapted to freeeivea-square nut .l0 ,which has an opening "that, is threaded and adapted to receivel a 'threaded rod 11. The walls ofthe squareportion la are provided'with openings pwhi'ch, valign with :the openings through the.nut lOQso vthatwhen the parts are in their assembled conditionithefnut ,isv prevented from dropping out andai;l vthe same time provides a member which Cre-` ceives the rod,.so that .it may begthreaded towardthe other end of the "Q ,clamp which is represented'at lb whichforinsan abut ment between which abutment and the end of the screw the material orobject to be clamped is received.

If the threads of the nut 10 becomes stripped or worn in usage, it is possible to renew the nut l0 by removing the screw ll and inserting a new' nut.

Having described our invention, we claim:

l. A clamp having a C-shaped body portion which is formed of two C-shaped parts one fitting within the other, the outer part enclosing' the inner and holding the same against movement with respect to the outer part, a threaded member associated with one end of the body portion, and a threaded rod extending through the Athreaded member.

2. A. clamp having a C-shaped body portion which is formed of two C-shaped sheet metal stampings which are assembled one within the other, the inner stamping titting within th-e outer andthe outerstamping iaving flanges engaging the inner stamping and retain the same, a threaded member associated with one end of the C clamp, and a threaded rod co-operating with said threaded member.

3. A clamp having a C-shaped body portion which is formed of inner and outer C- shaped parts, the outer of the parts being formed of sheet metal and engaging one side of the inner part, said outer part' hav# ing anges engaging the inner and `outer edges of the inner part and bent over into l engagement with the opposite side thereof thereby to secure the parts together, a threaded member associated With one end of the body portion, and a threaded rod cooperating with said threaded member.

l. A clamp having a C-shaped body portion which is formed of inner and outer C- shaped sheet metal parts, the inner part being formed with a central groove in the Vside thereof and having its edges bent back upon themselves to form laterally projecting flanges, the outer part having a groove formed in the side thereof and having laterally extending edge flanges between which the inner part fits which are bent over into engagement With the inner part to hold the same in place, a threaded member eo-op- @rating With one end of the body portion, and a threaded rod co-operating with said threaded member.

5,'A clamp having a C-shaped body formed of inner and outer C-shaped parts, the inner part being flanged subtantially through its length and the outer part embracing said inner part and engaging opposite sides thereof, and a threaded rod extending through one end of said body and adjustable toward and from the opposite end thereof.

t. A clamp having ra C-shaped body formed of inner and outer C-shaped parts, the inner part having a Web portion and latneasee erally projecting flanges along the inner and outer edges thereof and the outer part being yformed of sheet metal and having a web portion engaging one side of the Web portion of the inner part and flanges overlying the flanges of the inner part, said flanges of the outer part being bent inwardlyv over the opposite side of the inner part to secure the parts together, and a threaded rod extending through one end of said body and adjustable toward 'and from the opposite end thereof. K y

7. A clamp having a v C-shaped body formed of inner and outer C-shaped sheet metal parts,.the inner part being substantially Lshaped in cross section andhaving a Web portion substantially in the plane of the body and flanges projecting outwardly along the inner and outer edges thereof, the outer part having a web portion engaging one side of the web portion-of the inner part and edge flanges overlying the inner and outer edges of the inner part and bent inwardly over the opposite side of thev inner part to Secure the same in place, and a threaded and clamping means Cooperating with the ends of said body.

In testimony whereof, We hereunto affix our signatures.

ILLIAM F. GREATHEAD. MILTON J. TAMBLYN. 

